Ive seen em, they seem unstable to me, I would rather have a pontoon or float tube personally though some say they like the portaboat.

You know, even with a small car, a 12 foot aluminum boat and harbor freight trailer weighs in pretty light, my 14ft aluminum and harbor freight boat trailer is easily pulled behind my 6 cyl 2 door wrangler and I barely notice it is there. Probably has a total weight of around 300 lbs - most cars could tow one.

Had one that I hung on the side of my 18 foot fifth wheel trailer that I pulled with a VW pickup. The boat was ok on calm water, don’t stand up in the thing, it was real skatie. My first aluminum boat was a Sears 12 foot with a trailer and I towed that thing down a ton of logging roads through out the Sierras with a Chevette 4 banger with the boat loaded with gear and fire wood.
I’d go with a tube or pontoon over the folding boat, just my 2 cents.